Bug 462675

Summary: Dolphin becomes unusably slow while a file transfer is in progress
Product: [Applications] dolphin Reporter: Riccardo Robecchi <sephiroth_pk>
Component: generalAssignee: Dolphin Bug Assignee <dolphin-bugs-null>
Status: REPORTED ---    
Severity: normal CC: fanzhuyifan, kfm-devel, softexpert
Priority: NOR    
Version: 22.08.3   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=454722
Latest Commit: Version Fixed In:

Description Riccardo Robecchi 2022-12-05 15:44:18 UTC 
SUMMARY
Moving files with Dolphin makes it unbearably slow, so much so that it stops responding to commands. This is true independently of the source and destination: I have tried transferring files both locally (e.g. from SD card to internal SSD, or from SSD to SSD) and on the network (to an NFS share) and the result is the same. Dolphin just becomes really sluggish, even in doing basic things such as scrolling up and down the list of files.
This behaviour wasn't present in 22.04, though I cannot say whether it was introduced with a Frameworks update or with the 22.08 version.

STEPS TO REPRODUCE
1. Transfer files (e.g. cut-and-paste)

OBSERVED RESULT
Dolphin becomes incredibly slow.

EXPECTED RESULT
Dolphin keeps on behaving normally.

SOFTWARE/OS VERSIONS
Linux: KDE neon
KDE Plasma Version: 5.26.3
KDE Frameworks Version: 5.100.0
Qt Version: 5.15.7

ADDITIONAL INFORMATION
Comment 1 Riccardo Robecchi 2022-12-08 09:59:59 UTC 
Small update. After updating to Plasma 5.26.4, Dolphin freezes entirely until the transfer is complete. There's also no notification of the ongoing transfer, it appears once it's done.
Comment 2 SoftExpert 2023-10-18 06:23:04 UTC 
I would reference also the bug #454722 - Dolphin becomes frozen if nfs shares declared in fstab are not available - previously the mount point was just showing empty. Currently reproduced with Dolphin 23.08.2.